Stereoscope.



UNITED STATES PATENT OFFICE.

STEREOSCOPE Specification of Letters Patent.

Patented July 24, 1906.

Application filed March 23, 1905. Serial No. 251,588.

To all whom it may concern:

Be it known that I, RICHARD R. WHITING, a citizen of the United States,and a resident of the city of Cincinnati, in the county of Hamilton andState of Ohio, have invented certain new and useful Improvements inStereoscopes, of which the following is a specification.

One object of my invention is to provide a device that shall effectuallyprevent the rays of light entering through one lens of the streoscopefrom crossing and entering that eye of the beholder which is before theother lens of the stereoscope.

The designed eflect of this device is to prevent the r'ays of lightentering either lens from crossing and distracting, impeding, or in anyWise interfering with the vision of the eye at the other lens.

Another object of my invention is to so construct this device as that itshall be the most eflectual and at the same time accommodate the nose ofthe person looking through the stereoscope.

Another object of my invention is to so construct the device as that itshall be easy of manufacture and economical of cost.

Another object of my invention is to so form the device as that it shallnot only form a constituent part of the frame of the stereoscope, butshall impart strength to the structure of the stereoscope.

The several features of my invention and the various advantagesresulting from their use conjointly or otherwise will be apparent fromthe following description and claims.

In the accompanying drawings, making a part of this application, and inwhich similar etters of reference indicate corresponding parts, Figure 1is a view in perspective of the box of a stereoscope of which myinvention is a part. Fig. 2 1s a view in pers ective of my preferredform of attachment or combination with a stereoscope. Fig. 3 is aperspective view of an abbreviated form of my preferred device asapplied to a stereoscopebox of a common and well-known construction.Fig. 4 represents in perspective by itself my device shown in Fig. 3 ascombined with the stereoscope-box.

I will now proceed to describe my invention in detail.

A indicates the front board of the stereoscope containing the usual twolenses B B. Between these lenses B and B is the usual space A at thelens-holder. This space is so well known that further description of itis omitted.

C indicates the usual hood common to stereoscopes. This hood extendsalong the upper part of the stereoscope and down at each side C and thenfrom the bottom of each side extends inwardly toward the midpart. of thestereoscopic box. Those end portions C C last described do not meet, butstop short of meeting, leaving a space D between them. This space is ofsufficient width to easily admit that portion of the nose which ispresent at this point when the stereoscope-box is adjusted to the faceof the person using it.

At the space A between the lenses and extending rearward from thelens-holder A that is, in the same direction as the hood extendstherefromI erect two partitions E E. The front edge of the right-handone of these partitions E comes near to the right-hand ens B and thefront edge of the left-hand one of these partitions comes near to thelefthand lens B. Thus located there is a space between these partitionsE E of ample width to admit the nose of the user, and when thestereoscope is in use the nose of the user of the stereoscope entersthis space. One of these partitions E comes at one side of the nose andthe other of these partitions comes at the other side of the nose. Therear edges of these partitions come so close, respectively, to therespective rear edges of the nose-that is, where the nose joins thefacethat all light from the one lens is prevented from crossing in frontof the nose over to the other lens. The advantage of this is obvious notonly to those skilled in the art, but also to all persons at allacquainted with the science of optics. Each picture of each lens is seenby its own eye without being interfered with by the rays of lightpassing through the lens opposite the other eye. Therefore each eye isfree to see untrammeled its own picture. The two pictures thus clearlyseen, one by the one eye and the other by the other eye, perfectlycombine to give an impression of alto-rilievo, which is the principalobject of a stereoscope. A preferred mode and a very convenient andvaluable one of fastening these partitions E to the stereoscope is shownin the drawings and consists of the plate E secured to the lens-holder Aof the stereoscope, preferably by a screw E. To this plate the frontedge of each partition is connected. Ordinarily these partitions E E andthe plate E are preferably integral. The partltion-plates E and E aresufficiently long to extend up and down substantially as shown, thuscuttin off the light thoroughly, as heretofore speci ed.

From this construction thus specified it is evident that this attachmenthaving the partitions E E can be readily applied to the common forms ofstereoscopes and confer upon them important advantages.

Where I apply my invention to stereoscopes in process of construction orto be made, various additional modes of combining the partition-plates EE with the hood may be employed. I have adopted one method which I findvery convenient and successful. It is as follows: I lengthen each of thepartition-plates E at its lower end, thus giving each plate an extensionE. I curve the latter substantially as shown. I form the hoodsubstantially as shown in Fig. 1, thus shortening the lower endportions. The attachment having the partitions E E, provided with theextensions E E", I place in position as indicated in Fig. 1. I connectthe free edge E of each extension with the edge C of the side 0.

The resultant structure is a strong neat double-chambered stereoscopicbox having all of the advantages of my invention. Where theconnecting-plate E is present, the device can be connected to thelens-holder by any suitable fastening, preferably by the screw E Thereare two leading distinct advantages of my invention. First, the twopartitions admit of the introduction of the nose besented through itslens of the stereoscope.

What I claim as new and of my invention, and desire to secure by LettersPatent, is

1. In a stereoscope, a hood, two partitions E located between the lensesand separated by a space for the reception of the nose of the user, saidpartitions E extending from the plane of the lenses toward the face oftheuser, a back plate in one with the partitions E and the hood at thebottom provided with the recess D, alining with the space between thepartitions, substantially as and for'the purposes specified.

2. In a stereoscope, the vertical partitions E, extending forward fromthe plane of the lenses toward the face of the user, lower extensions E,hood 0, of which the extensions united to the rest of the hood at E forma part, front plate E connected to the partitions E, and secured to thelens-holder, the partitions having a space between them, substantiallyas and for the purposes specified.

RICHARD R. WHITING. Attest:

CHARLES G. SPIEGEL. WM. HARTLEY PUGH.

